Saddle bag for a motorcycle



FIG. 1 is a right rear perspective view of a saddle bag for a motorcycle, showing my new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a rear end view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a saddle bag for a motorcycle, as shown. 